Table 1 |
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|
Item scaling tests: convergent validity for DLQI scales |
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|
Scale |
No. of items per scale |
Convergent validity (range of correlation) |
Scaling Success1 |
Scaling Success Rate2 |
Internal consistency (Cronbach's α) |
|
|
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|
SF |
2 |
0.69–0.78 |
2/2 |
100 |
0.70 |
|
DA |
2 |
0.71–0.78 |
2/2 |
100 |
0.76 |
|
L |
2 |
0.67–0.88 |
2/2 |
100 |
0.71 |
|
WS |
1 |
1.00 |
1/1 |
100 |
1.00 |
|
PR |
2 |
0.50–0.99 |
2/2 |
100 |
0.79 |
|
T |
1 |
1.00 |
1/1 |
100 |
1.00 |
|
|
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|
SF (Symptoms and feelings), DA (Daily activities), L (Leisure), WS (Work and School),PR (Personal relationships), T (Treatment) 1- Number of correlation between items and hypothesized scale corrected for overlap ≥ 0.4/ total number of convergent validity tests. 2- Scaling success rate is the previous column as a percentage. |
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|
Aghaei et al. BMC Dermatology 2004 4:8 doi:10.1186/1471-5945-4-8 |
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